Armature winding



W. l. WARDER, 1a., DECD. R. w. LIMBACH. ADMINISTRATOR.

ARMATURE WINDING.

APPLICATION FILED JAN. 11, 1918.

1,430, 1 30. Patented Sept. 26, 1922.

3 SHEETS-522.2

w. J. WARDER, JR., DE-CD.

' R..W. LIMBACH, ADMINISTRATOR- ARMATU RE wmpms.

APPLICATION FILED mulivkma.

v PatentedSept. 26, 1922.

- 3 SHEETSSHEET 3.

pl in constructing armatures of the char- Patented Sept. 26, 1922.

UNITED'STAT'ES 1,430,130 PATENT OFFICE.

.WAL'IER J. wannnnan, or GHICAGO, ILLINOIS nusssnr. ARDER LIMBACH ADMINISTRATOROF SAID WALTER J. WARDER, DECEASED.

ARMA'IURE WINDING.

Application filed January 17, 1918. Serial No. 212,219.

To all whom it may concern.

Be it known that I, VVALTER J. VARDER, Jr.,.a citizen of the United States of .America, and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Armature findings, of which the following is a specification. i

This invention relates to dynamo-electrio machinery, and especially to the arma ture circuits and circuit members of heavy current generators such as are used to supcurrent for electrolytic work.

acter stated, it is always desirable to economize conductor space under the poles, and to provide as many turns as possible in a given space. work the inductive parts of the winding at as high a current densityas may be consistent with permissible temperature. Hence, it is advantageous and has long been customary to use fiat rods or ribbons set edgewise for conductors, and these have been disposed and connected in various ways, but always subject to heat limitations. Moreover they have been subject to more or less'difliculty in forming and to waste of material in forming or to ineflicient disposition of the conducting material. i

The main objects of the invention are to provide an improved form of conductors for the armature coils and commutator'connectors, and improved methods for making and assembling same; to provide such coils and connectors in simple forms adapted for machine manufacture and ready assemblage; to provide for eflicient disposition of the conductor material; to provide improved and more economical methods and means for making large capacity. windings adapted for high current density in generating part and rapid heat radiation in the connecting parts, and especially to make such windings from sheet metal 'by punching suitable conductor parts therefrom Y and connecting same together in due form; to provide sheet metal coils and complementary commutator connectors therefor, adapted for ready forming from punchings; to provide sheet metal punchings of suitable forms and with a minimum of waste material, adapted for bending sidewise into To this end it is necessary to commutator connectors; and to provide such conductors adapted to fit compactly in place when assembled toproduce a perfectly balanced and symmetrical armature.

An illustrative embodiment of this inyention is shown in the accompanying drawings in'which-- I Fig. 1 is an end view of one side of a double wound armature with the shaft shown in cross section, part of the winding being broken away and part of the circuit being shown diagrammatically.

Fig. 2 is a cross section through one of the armature slots.

Fig. 3 is a conventional diagram of part of one of the windings of the armature developed in aplane. i

Fig. 4 is a side view of the armature with certain parts broken away to show the in terlor construction.

Fig. 5 is a perspective view showing part of one of thewindings. y

Y Fig. 6 is a fragmentary view of part of the armature as viewed from one side, the outer protective covering being removed.

Fig. 7 is a plan of one of the conductor punchings formed into shape ready to serve as an armature coil. V

Fig. 8 is a plan of a punching ready for forming into a coil such as is shown in Fig. 7, the dotted lines representing a sheet metal blank and showing the relative position of the punchings struck therefrom.

Fig. 9 is a side view of the coil shown in Fig. 7. v v

Fig. 10 is an end view of the coil in Fig. 9 as viewed from the left.

Fig. 11 is a plan of an end connector punching for the commutator end of a coil. in the illustrative embodiment shown in the drawingaa double wound armature 1 shown is provided with a pair of commutators 2 distributed uniformlv about its periphery,

alternate slots 7 constituting one set being used for one of the windings 4 and the other slots 7 being used for the second winding 5. The machine shown and described has ten poles 8 and said armature has fifty slots. Each ofsaid commutators contains twentyfivesegments 9 corresponding with the number of coils in eachof said windings. Each coil comprises a single turn.

Each of the armature turn or coils comprises a loop part 10 the sides of which at? adapted to fit in certain respective slots and an end connecting part 11 termed and adapted for connecting the loops 1() to the commutator and to one another in continuous succession to make a closed circuit winding, the structure and shape oi? the coils being shown clearly inv Fig. 5.

Each of the coil units or turns proper 10 consists of a punching 10 struck from a. plate of suitable sheet metal, preferably copper, which punchingis termed into shape by suitable bending, as hereinafter described. Each of said punchings is of L-shape in general term, and comprises a pair of L-shaped branches connected at the outer ends of the short arm, each of the short arms 12 being relatively wide as compared with the long slender arms 13. Said punching is formed into suitable shape for use as a coil loop by bending the two short arms sidewise in opposite directions from the plane of the connecting part 1 1, and at or near the point where the long and short arms merge together the short arms are bent, as at 15, so as to dispose the long arms in planes which are substantially radial to the axis of the armature when set in place thereon in the corresponding slots 7. As thus constructed, each coil comprises a pair of light and narrow inductively active conductors 13 adapted to it in the slots 7 under the field poles 9, and a relatively broad and heavy connecting part 1% having a large radiating surface. In bending the punching into shape the arms 13 are swung to such relative position as to be located 180 electrii :al degrees apart when assembled in place, the precise form depending on the number of poles comprised by the field memher. The L-shaped punchings 10 may be struck from a long, narrow strip o't sheet metal, 16, the relative position of the punchings to the stock being illustrated in Fig. 8, where the numerals 16 and 16 indicate the edges of said strip. One punching is shown in full lines, and the next adjacent punching is represented by dotted lines. this arrangement oi? punchings, great economy of material is e'lij'ected, as there is very little waste of the high grade copper stock used.

The structure of the end connectors 11 is comparatively simple. Said connectors are formed from plain U-shapedpunchings 11, the arms 17 of which are bent away from each other on opposite sides of the plane of the connecting part 18. In order to facilitate connecting the adjoining ends of: the coil loops and end connectors respectively, the ends of the latter are preferably forked, as at 19, to receive the corresponding ends of the loop arms 13. For this purpose, each connector may toaiilvantage consist oi a pair of similar U-punchings 11. duly formed and fa, tened together face to face in laminated arrangement, with the outer ends of the corresponding arms 17 spread apart somewhat to provide the said fork 1.9. component layers of each arm of a connector are n'e'ferably riveted together adjacent to the fork as at 20.

Each of the commutator segments 9 is provided with a longitudinal slot 21 at or ad- 7 jacent to its inner end for receiving the middle or body part 18 0t each end connector '11. The said connectors are secured to the commutatm: segments by rivets 22 supplemented by solder. This is done before So the commutator segments are assembled, and the members 11 take the place oi" the lungs usually provided on comn'uitatnr bars.

.ln assembling the armature parts, the coils or loop members 10 and the end connectors 11 are applied to the armature indcpei'zdently, and when fully assembled, are fastened together in series, preferably by soldering, or in such other manner as will provide good electrical contact. Corres 'ionding branches of all of the loop members 10, that is to say on one side, are disposed in the bottom parts 0t tlr slots 7, which are deep and narrow and the complementary arms are disposed in the outer parts of the corresponding slots respectively. For instance referring to the upper part of Fig. 1, the left arm 13 oil? each loop of winding l is in the bottom of its slot, and the other arm is in the outer part of the fourth slot to the right. Each connector 11 has its right arm connected. to an outer conductor in one slot, and its left arm to an inner conductor three slots to the left.

In forming the windings and applying same to the ari'nature no edgewise bending oi? the punchings is necessary, the shape of the punchings being such that sidewise bending oithe end loops and connectors is suilicient to produce the required shape.

Insulation is IH'OVldQLl. for tor, and the windings are held in pla; any suitable loclrirg means, such for ins as a wedge member 2- illi'. 'atcd in 1.. The ends 0'! the conductors 1Z1 projecti be TOI1Cl the sides of the core (3 and especially the ends carrying the heavy cross-over parts or loop ends 1-t are secured against centri'lm gal force by suitable binding means 25.

The coil parts 10 and 11 are herein described as made from punchings, but corresponding strips tormed by shearing, sawing, or otherwise may be used, and respecting the claims such strips are to be regarded as equivalents oi punchings, though there are many advantages peculiar to the manutaw 1 ture and use of acti'lal puncbi z Although but one specific c HKllll'ltllt' o? the invention has been herein. shown and described, it will be understood that numerous details of the construction shown may be The altered or omitted without departing from the spirit of this invention as defined by the following claims. i

I claim:

1. An armature comprising two double layer windings wit-hinvolute end connections adapted for connection to commutators upon opposite sides thereof, the coils of one winding having their connecting portions disposed in alternate slots relative to the slots housing the other winding and the involute end connecting portions of said windings being disposed in different planes.

2. An armature comprising two sets of windings disposed upon a core and connected 15 tive portions housed in alternate slots, and 20 the end connecting portions of said windings being disposed in endwise relation, thereby substantially preventing mutual induction in said end connections.

WALTER J. WARDER, JR.

Signed at Chicago this 4th day of Jan, 25 

